Remove constant handling from fold_builtin_{,f}abs

[Richard Sandiford]

fold_builtin_fabs and fold_builtin_abs had code to handle constant
arguments, but this simply duplicated what the following fold_build1_loc
would do for ABS_EXPR.

Tested on x86_64-linux-gnu, aarch64-linux-gnu and arm-linux-gnueabi.
OK to install?

Thanks,
Richard


gcc/
        * builtins.c (fold_builtin_fabs): Remove constant handling.
        (fold_builtin_abs): Likewise.

diff --git a/gcc/builtins.c b/gcc/builtins.c
index ed0030d..a03dffc 100644
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -7847,8 +7847,6 @@ fold_builtin_fabs (location_t loc, tree arg, tree type)
     return NULL_TREE;
 
   arg = fold_convert_loc (loc, type, arg);
-  if (TREE_CODE (arg) == REAL_CST)
-    return fold_abs_const (arg, type);
   return fold_build1_loc (loc, ABS_EXPR, type, arg);
 }
 
@@ -7861,8 +7859,6 @@ fold_builtin_abs (location_t loc, tree arg, tree type)
     return NULL_TREE;
 
   arg = fold_convert_loc (loc, type, arg);
-  if (TREE_CODE (arg) == INTEGER_CST)
-    return fold_abs_const (arg, type);
   return fold_build1_loc (loc, ABS_EXPR, type, arg);
 }